*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* HarmonyOS 字体声明 */
@font-face {
  font-family: 'HarmonyOS Sans SC';
  src: url('fonts/HarmonyOS_Sans_SC_Thin.ttf') format('truetype');
  font-weight: 100;
  font-style: normal;
}
@font-face {
  font-family: 'HarmonyOS Sans SC';
  src: url('fonts/HarmonyOS_Sans_SC_Light.ttf') format('truetype');
  font-weight: 300;
  font-style: normal;
}
@font-face {
  font-family: 'HarmonyOS Sans SC';
  src: url('fonts/HarmonyOS_Sans_SC_Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
}
@font-face {
  font-family: 'HarmonyOS Sans SC';
  src: url('fonts/HarmonyOS_Sans_SC_Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
}
@font-face {
  font-family: 'HarmonyOS Sans SC';
  src: url('fonts/HarmonyOS_Sans_SC_Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
}
@font-face {
  font-family: 'HarmonyOS Sans SC';
  src: url('fonts/HarmonyOS_Sans_SC_Black.ttf') format('truetype');
  font-weight: 900;
  font-style: normal;
}

:root {
  --accent: #2563EB;
  --accent-soft: rgba(37,99,235,0.1);
  --accent-border: rgba(37,99,235,0.18);
  --text-1: #0D1117;
  --text-2: #5C6878;
  --text-3: #9BA8B7;
  --glass: rgba(255,255,255,0.22);
  --glass-border: rgba(255,255,255,0.45);
  --glass-stroke: rgba(255,255,255,0.3);
  --glass-shadow: 0 2px 24px rgba(37,99,235,0.04), 0 1px 3px rgba(0,0,0,0.03), 0 0 0 1px rgba(255,255,255,0.04);
  --radius-lg: 20px;
  --radius-md: 14px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'HarmonyOS Sans SC', sans-serif;
  background: #F2F5FB;
  color: var(--text-1);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── BACKGROUND ── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  background: url('muliu.png') center/cover no-repeat fixed;
  filter: blur(8px);
  transform: scale(1.1);
}
body::after {
  content: '';
  position: fixed; inset: 0; z-index: 0;
  background: rgba(242, 245, 251, 0.35);
  pointer-events: none;
}

/* ── LAYOUT WRAPPER ── */
.wrap {
  position: relative; z-index: 2;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex; justify-content: center;
  padding: 1rem 2.5rem;
}

.nav-pill {
  display: flex; align-items: center;
  justify-content: space-between;
  width: 100%; max-width: 860px;
  padding: 0.65rem 1.5rem;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.35);
  outline: 1px solid rgba(255,255,255,0.15);
  outline-offset: -1px;
  border-radius: 100px;
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  box-shadow: 0 2px 20px rgba(37,99,235,0.04), 0 1px 2px rgba(0,0,0,0.02);
  position: relative;
}

.nav-brand {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text-1);
}

.nav-brand em { font-style: normal; color: var(--accent); }

.nav-links {
  display: flex; gap: 1.75rem; list-style: none;
}

.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--accent); }

.nav-dl {
  background: var(--accent);
  color: white;
  text-decoration: none;
  padding: 0.38rem 1.1rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
}

.nav-dl:hover { opacity: 0.88; transform: scale(1.03); }

.nav-menu-btn {
  display: none;
  background: rgba(255,255,255,0.25);
  border: 1px solid rgba(255,255,255,0.35);
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-1);
  width: 42px;
  height: 42px;
  border-radius: 12px;
  transition: background 0.2s, transform 0.15s;
}

.nav-menu-btn:hover {
  background: rgba(255,255,255,0.4);
}

.nav-menu-btn:active {
  transform: scale(0.96);
}

.nav-menu-btn svg {
  width: 100%;
  height: 100%;
}

.nav-drawer {
  visibility: hidden;
  position: absolute;
  top: 100%;
  left: 50%;
  transform-origin: top center;
  transform: translateX(-50%) scale(0.92) translateY(-6px);
  width: 100%;
  max-width: 420px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.7);
  border-radius: 18px;
  margin-top: 0.7rem;
  padding: 0.8rem;
  box-shadow: 0 10px 32px rgba(0,0,0,0.15), 0 2px 8px rgba(0,0,0,0.06);
  overflow: hidden;
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.18s, visibility 0.18s;
}

.nav-drawer.open {
  visibility: visible;
  transform: translateX(-50%) scale(1) translateY(0);
  opacity: 1;
}

.nav-drawer-links {
  list-style: none;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.nav-drawer-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.7rem 1rem;
  border-radius: 12px;
  transition: background 0.2s, color 0.2s, transform 0.15s;
  flex: 1;
  min-width: 100px;
  text-align: center;
}

.nav-drawer-links a:hover {
  background: rgba(37,99,235,0.08);
  color: var(--accent);
  transform: translateY(-2px);
}

.nav-drawer-links a:first-child {
  margin-top: 0;
}

@media (max-width: 768px) {
  .nav-links,
  .nav-dl {
    display: none;
  }

  .nav-menu-btn {
    display: block;
  }
}

/* ── HERO ── */
.hero {
  position: relative; z-index: 2;
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 8rem 2.5rem 6rem;
}

.hero-chip {
  display: inline-flex; align-items: center; gap: 0.45rem;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 100px;
  padding: 0.3rem 0.9rem;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 2.25rem;
  animation: rise 0.7s ease both;
}

.hero-chip-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.8s ease infinite;
}

.hero-title {
  font-size: clamp(4rem, 10vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text-1);
  margin-bottom: 0.7rem;
  animation: rise 0.7s 0.08s ease both;
}

.hero-particle-wrap {
  position: relative;
  width: min(94vw, 620px);
  height: clamp(130px, 19vw, 190px);
  margin: 0 auto;
}

#heroParticleCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero-sub {
  font-size: clamp(0.9rem, 2.5vw, 1.05rem);
  font-weight: 300;
  letter-spacing: 0.35em;
  color: var(--text-3);
  margin-bottom: 2rem;
  animation: rise 0.7s 0.15s ease both;
}

.hero-desc {
  max-width: 400px;
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.9;
  margin-bottom: 2.75rem;
  animation: rise 0.7s 0.22s ease both;
}

.hero-actions {
  display: flex; gap: 0.9rem; justify-content: center;
  flex-wrap: wrap;
  animation: rise 0.7s 0.3s ease both;
}

.btn-p {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--accent);
  color: white; text-decoration: none;
  padding: 0.72rem 1.9rem;
  border-radius: 12px;
  font-size: 0.88rem; font-weight: 600;
  font-family: inherit;
  box-shadow: 0 4px 18px rgba(37,99,235,0.28);
  transition: box-shadow 0.22s;
}

.btn-p:hover { box-shadow: 0 8px 28px rgba(37,99,235,0.36); }

.btn-s {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--glass);
  color: var(--text-1); text-decoration: none;
  padding: 0.72rem 1.9rem;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  outline: 1px solid var(--glass-stroke);
  outline-offset: -1px;
  font-size: 0.88rem; font-weight: 600;
  font-family: inherit;
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  transition: background 0.22s, border-color 0.22s;
}

.btn-s:hover { background: rgba(255,255,255,0.45); border-color: rgba(255,255,255,0.65); }

/* ── SECTION BASE ── */
section {
  position: relative; z-index: 2;
}

.section-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 6rem 2.5rem;
}

.sec-head {
  text-align: center;
  margin-bottom: 3rem;
}

.sec-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 0.7rem;
}

.sec-title {
  font-size: clamp(1.7rem, 3.5vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.sec-desc {
  font-size: 0.9rem;
  color: var(--text-2);
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.85;
}

/* ── GLASS CARD ── */
.card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  outline: 1px solid var(--glass-stroke);
  outline-offset: -1px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  box-shadow: var(--glass-shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, outline-color 0.25s ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(255,255,255,0.6);
  outline-color: rgba(255,255,255,0.45);
  box-shadow: 0 12px 40px rgba(37,99,235,0.08), 0 2px 6px rgba(0,0,0,0.03), 0 0 0 1px rgba(255,255,255,0.08);
}

/* ── AZURESOURCE ── */
.azuresource-bar {
  max-width: 880px; margin: 0 auto;
  padding: 0 2.5rem 5rem;
  position: relative; z-index: 2;
}

.azuresource-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.75rem 2rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  outline: 1px solid var(--glass-stroke);
  outline-offset: -1px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  box-shadow: var(--glass-shadow);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.azuresource-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255,255,255,0.55);
  box-shadow: 0 12px 40px rgba(37,99,235,0.08), 0 2px 6px rgba(0,0,0,0.03), 0 0 0 1px rgba(255,255,255,0.08);
}

.azuresource-logo {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  object-fit: contain;
}

.azuresource-info {
  flex: 1;
  min-width: 0;
}

.azuresource-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  letter-spacing: -0.02em;
}

.azuresource-name em {
  font-style: normal;
  color: var(--accent);
}

.azuresource-desc {
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.75;
}

.azuresource-link {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
  transition: gap 0.2s;
}

.azuresource-card:hover .azuresource-link {
  gap: 0.55rem;
}

.azuresource-arrow {
  transition: transform 0.2s;
}

.azuresource-card:hover .azuresource-arrow {
  transform: translateX(3px);
}

.azuresource-bar.pv-liquid .azuresource-card {
  background: rgba(37,99,235,0.06);
  backdrop-filter: blur(24px) saturate(1.3);
  -webkit-backdrop-filter: blur(24px) saturate(1.3);
}

.azuresource-bar.pv-liquid .azuresource-name {
  color: #60A5FA;
}

.azuresource-bar.pv-liquid .azuresource-desc {
  color: rgba(148,163,184,0.85);
}

/* ── FEATURES GRID ── */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}

.feat-card {
  padding: 1.6rem;
}

.feat-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--accent-soft);
  display: grid; place-items: center;
  margin-bottom: 1.1rem;
}

.feat-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent);
  stroke-width: 2;
  fill: none;
}

.feat-name {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
  letter-spacing: -0.01em;
}

.feat-text {
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.75;
}

/* ── TOOLS LIST ── */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.tool-card {
  display: flex; align-items: flex-start;
  gap: 1rem;
  padding: 1.4rem 1.5rem;
}

.tool-em {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  display: grid;
  place-items: center;
}

.tool-em svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  stroke-width: 2;
  fill: none;
}

.tool-name {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.tool-desc {
  font-size: 0.77rem;
  color: var(--text-2);
  line-height: 1.7;
}

/* ── TESTS GRID ── */
.tests-card {
  padding: 2.25rem;
}

.tests-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.test-item {
  text-align: center;
  padding: 1.5rem 1rem;
  border-right: 1px solid rgba(0,0,0,0.04);
  border-bottom: 1px solid rgba(0,0,0,0.04);
  transition: background 0.2s;
}

.test-item:hover { background: rgba(37,99,235,0.03); }
.test-item:nth-child(3n) { border-right: none; }
.test-item:nth-child(n+5) { border-bottom: none; }

.test-icon {
  margin-bottom: 0.5rem;
  display: inline-flex;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  align-items: center;
  justify-content: center;
}

.test-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  stroke-width: 2;
  fill: none;
}

.test-name {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.test-note {
  font-size: 0.74rem;
  color: var(--text-2);
}

/* ── DELTA DARK CARD ── */
.delta-card {
  border-radius: 24px;
  padding: 3rem 3rem 2.75rem;
  background:
    radial-gradient(ellipse 60% 80% at 90% 50%, rgba(37,99,235,0.18) 0%, transparent 60%),
    linear-gradient(145deg, #0D1626 0%, #111827 100%);
  border: 1px solid rgba(255,255,255,0.18);
  outline: 1px solid rgba(255,255,255,0.08);
  outline-offset: -1px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.18);
  color: white;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s;
}

.delta-card:hover { transform: translateY(-4px); }

.delta-card::before {
  content: '';
  position: absolute;
  right: 2.5rem; top: 50%;
  transform: translateY(-50%);
  width: 200px;
  height: 200px;
  background: url('deltaforce.png') center/contain no-repeat;
  opacity: 0.12;
  user-select: none;
  pointer-events: none;
}

.delta-chip {
  display: inline-block;
  background: rgba(37,99,235,0.2);
  border: 1px solid rgba(37,99,235,0.35);
  border-radius: 100px;
  padding: 0.22rem 0.75rem;
  font-size: 0.72rem;
  color: #93C5FD;
  font-weight: 600;
  letter-spacing: 0.07em;
  margin-bottom: 1.2rem;
}

.delta-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.7rem;
}

.delta-desc {
  font-size: 0.86rem;
  color: rgba(255,255,255,0.5);
  max-width: 420px;
  line-height: 1.85;
  margin-bottom: 1.8rem;
}

.delta-tags {
  display: flex; flex-wrap: wrap; gap: 0.6rem;
}

.delta-tag {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.65);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 100px;
  padding: 0.28rem 0.8rem;
}

.delta-tag::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #60A5FA;
}

/* ── OPT GRID ── */
.opt-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
}

.opt-card { padding: 1.75rem; }

.opt-icon {
  margin-bottom: 0.9rem;
  display: inline-flex;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--accent-soft);
  align-items: center;
  justify-content: center;
}

.opt-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent);
  stroke-width: 2;
  fill: none;
}

.opt-name { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.45rem; }
.opt-text { font-size: 0.8rem; color: var(--text-2); line-height: 1.75; }

/* ── HARDWARE GRID ── */
.hw-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.hw-item {
  text-align: center;
  padding: 2rem 1.25rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  outline: 1px solid var(--glass-stroke);
  outline-offset: -1px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.hw-item:hover {
  transform: translateY(-3px);
  border-color: rgba(255,255,255,0.55);
}

.hw-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  border-radius: 16px;
  display: grid;
  place-items: center;
}

.hw-icon svg {
  width: 28px;
  height: 28px;
  stroke-width: 1.8;
}

.hw-icon-cpu { background: rgba(37,99,235,0.08); color: #2563EB; }
.hw-icon-gpu { background: rgba(217,119,6,0.08); color: #D97706; }
.hw-icon-ram { background: rgba(13,148,136,0.08); color: #0D9488; }
.hw-icon-disk { background: rgba(124,58,237,0.08); color: #7C3AED; }
.hw-icon-net { background: rgba(220,38,38,0.08); color: #DC2626; }
.hw-icon-mb { background: rgba(71,85,105,0.08); color: #475569; }

.hw-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

.hw-desc {
  font-size: 0.78rem;
  color: var(--text-2);
  line-height: 1.7;
}

/* ── OPTIMIZE CATEGORIES ── */
.opt-categories {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.opt-cat {
  padding: 1.75rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  outline: 1px solid var(--glass-stroke);
  outline-offset: -1px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.opt-cat:hover {
  transform: translateY(-3px);
  border-color: rgba(255,255,255,0.55);
}

.opt-cat-head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 1.1rem;
}

.opt-cat-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.opt-cat-icon svg {
  width: 22px;
  height: 22px;
  stroke-width: 2;
}

.opt-cat-name {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.opt-cat-count {
  font-size: 0.75rem;
  color: var(--text-3);
  font-weight: 500;
}

.opt-cat-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.opt-tag {
  font-size: 0.74rem;
  padding: 0.3rem 0.7rem;
  background: rgba(37,99,235,0.06);
  color: #2563EB;
  border-radius: 100px;
  font-weight: 500;
  transition: background 0.2s, transform 0.2s;
}

.opt-tag:hover {
  transform: translateY(-1px);
}

.opt-tag-amber { background: rgba(217,119,6,0.06); color: #B45309; }
.opt-tag-teal { background: rgba(13,148,136,0.06); color: #0F766E; }
.opt-tag-purple { background: rgba(124,58,237,0.06); color: #6D28D9; }

/* ── TOOLS LIST ── */
.tools-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tool-row {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  outline: 1px solid var(--glass-stroke);
  outline-offset: -1px;
  border-radius: var(--radius-md);
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.tool-row:hover {
  transform: translateX(4px);
  border-color: rgba(255,255,255,0.55);
  background: rgba(255,255,255,0.3);
}

.tool-em {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
}

.tool-em svg {
  width: 22px;
  height: 22px;
  stroke-width: 2;
}

.tool-info {
  flex: 1;
  min-width: 0;
}

.tool-name {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.tool-desc {
  font-size: 0.78rem;
  color: var(--text-2);
  line-height: 1.7;
}

/* ── FEATURE TAGS ── */
.feat-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.feat-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.2rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  outline: 1px solid var(--glass-stroke);
  outline-offset: -1px;
  border-radius: 100px;
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-1);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.feat-tag:hover {
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.55);
  background: rgba(255,255,255,0.35);
}

.feat-tag svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
  color: var(--accent);
}

.feat-tag-lg {
  padding: 0.85rem 1.5rem;
  font-size: 0.88rem;
}

.feat-tag-lg svg {
  width: 20px;
  height: 20px;
}

/* ── CTA CARD ── */
.cta-card {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  padding: 4rem 3rem;
  text-align: center;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 50% 60% at 20% 30%, rgba(37,99,235,0.25) 0%, transparent 60%),
    radial-gradient(ellipse 40% 50% at 80% 70%, rgba(217,119,6,0.2) 0%, transparent 60%),
    linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
  z-index: 0;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 100px;
  font-size: 0.76rem;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  margin-bottom: 1.5rem;
}

.cta-chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34D399;
  animation: pulse 2s ease infinite;
}

.cta-title {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: white;
  margin-bottom: 0.8rem;
}

.cta-desc {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.9;
  margin-bottom: 2rem;
}

.cta-actions {
  display: flex;
  gap: 0.9rem;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.8rem 2rem;
  border-radius: 14px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  font-family: inherit;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.cta-btn-primary {
  background: white;
  color: #0F172A;
  box-shadow: 0 4px 20px rgba(255,255,255,0.15);
}

.cta-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255,255,255,0.2);
}

.cta-btn-ghost {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.9);
  border: 1px solid rgba(255,255,255,0.15);
}

.cta-btn-ghost:hover {
  background: rgba(255,255,255,0.15);
  transform: translateY(-2px);
}

/* ── PREVIEW ── */
.pv-wrap {
  max-width: 720px;
  margin: 0 auto;
}

.pv-comp {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06), 0 0 0 1px rgba(255,255,255,0.2);
  transition: box-shadow 0.4s ease;
  user-select: none;
  cursor: col-resize;
}

.pv-comp.pv-liquid {
  box-shadow: 0 8px 40px rgba(37,99,235,0.10), 0 0 0 1px rgba(37,99,235,0.15);
}

.pv-img {
  display: block;
  width: 100%;
  height: auto;
}

.pv-light-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  clip-path: inset(0 50% 0 0);
  z-index: 1;
}

.pv-light-wrap .pv-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  display: block;
}

/* ── HANDLE ── */
.pv-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 0;
  z-index: 3;
  transform: translateX(-50%);
  touch-action: none;
}

.pv-handle-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: rgba(255,255,255,0.8);
  transform: translateX(-50%);
  box-shadow: 0 0 6px rgba(0,0,0,0.2);
  transition: background 0.3s ease;
}

.pv-liquid .pv-handle-line {
  background: rgba(37,99,235,0.6);
}

.pv-handle-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.95);
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
  display: grid;
  place-items: center;
  color: #475569;
  transition: transform 0.25s ease, background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

.pv-handle:hover .pv-handle-knob {
  transform: translate(-50%, -50%) scale(1.1);
}

.pv-handle-knob svg {
  width: 16px;
  height: 16px;
}

.pv-liquid .pv-handle-knob {
  background: white;
  color: var(--accent);
  box-shadow: 0 2px 12px rgba(37,99,235,0.25);
}

/* ── LIQUID GLOW OVERLAY ── */
.pv-comp.pv-liquid::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: radial-gradient(ellipse 60% 40% at 50% 30%, rgba(37,99,235,0.06) 0%, transparent 60%);
}

/* ── TOGGLE ── */
.pv-toggle-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.pv-toggle-text {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  transition: color 0.25s ease;
}

.pv-toggle-text--on {
  color: var(--text-3);
}

.pv-toggle-text--off {
  color: var(--accent);
}

.pv-on .pv-toggle-text--on {
  color: var(--accent);
}

.pv-on .pv-toggle-text--off {
  color: var(--text-3);
}

.pv-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  cursor: pointer;
}

.pv-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.pv-slider {
  position: absolute;
  inset: 0;
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.2);
  border-radius: 26px;
  transition: all 0.3s ease;
}

.pv-slider::before {
  content: '';
  position: absolute;
  left: 3px;
  bottom: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.12);
  transition: transform 0.3s ease, background 0.3s ease;
}

.pv-switch input:checked + .pv-slider {
  background: var(--accent);
  border-color: var(--accent);
}

.pv-switch input:checked + .pv-slider::before {
  transform: translateX(22px);
  background: white;
}

.pv-switch input:checked ~ .pv-toggle-text--on {
  color: var(--accent);
}

/* ── FOOTER ── */
footer {
  position: relative; z-index: 2;
  text-align: center;
  padding: 4rem 2.5rem 3.5rem;
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 0.6rem;
}

.footer-brand em { font-style: normal; color: var(--accent); }

.footer-note {
  font-size: 0.8rem;
  color: var(--text-3);
  line-height: 1.9;
}

/* ── DIVIDER ── */
.divider-line {
  width: 40px; height: 1px;
  background: var(--text-3);
  margin: 0 auto 2.5rem;
  opacity: 0.3;
}

/* ── ANIMATIONS ── */
@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.6; }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.cursor {
  display: inline-block;
  animation: blink 0.8s infinite;
  color: var(--accent);
  font-weight: normal;
  margin-left: 2px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 700px) {
  .nav-links { display: none; }
  .feat-grid { grid-template-columns: 1fr 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
  .opt-grid { grid-template-columns: 1fr; }
  .tests-grid { grid-template-columns: repeat(2, 1fr); }
  .tests-grid .test-item:nth-child(2n) { border-right: none; }
  .tests-grid .test-item:nth-child(n+5) { border-bottom: none; }
  .tests-grid .test-item:nth-child(3n) { border-right: 1px solid rgba(0,0,0,0.04); }
  .azuresource-card { flex-direction: column; text-align: center; padding: 1.5rem; }
  .delta-card { padding: 2rem; }
  .delta-card::before { display: none; }
  .hw-grid { grid-template-columns: 1fr 1fr; }
  .opt-categories { grid-template-columns: 1fr; }
  .cta-card { padding: 2.5rem 1.5rem; }
  .tool-row { padding: 1rem 1.1rem; }
  .pv-handle-knob { width: 28px; height: 28px; }
  .pv-handle-knob svg { width: 12px; height: 12px; }
}

@media (max-width: 480px) {
  .feat-grid { grid-template-columns: 1fr; }
  .hero-title { letter-spacing: -0.03em; }
  .hw-grid { grid-template-columns: 1fr; }
  .stat-n { font-size: 1.75rem; }
  .stat-l { font-size: 0.7rem; }
  .feat-tag { padding: 0.6rem 1rem; font-size: 0.78rem; }
  .feat-tag-lg { padding: 0.75rem 1.25rem; font-size: 0.82rem; }
}